By Matt Audilet Walking out onto the Cameron Indoor Stadium floor as head coach of the Duke Blue Devils one final time, tonight is no doubt an emotional event for longtime program leader Mike Krzyzewski. Before tipoff of tonight’s rivalry matchup between Duke and North Carolina, the program held a ceremony for Coach K featuring a tribute video and countless former Blue Devil players in attendance. Coach K looked on, seemingly on the verge of tears, as the Cameron Crazies went wild. Heading into tonight’s game — the final regular-season contest of Krzyzewski’s 42nd year at Duke — the No. 4 Blue…